Why would you possibly need to do that??!! even if you could, the step before it would include that!!
– Digital LightcraftSep 2 '15 at 8:36

You can work in PS in such a way that most of the actions are still alive (live effects, adjustment layers, vector masks etc.) But there are situations where you are not satisfied with some of clone stamp clicks, or brush strokes. And you realize that 15 minutes ( and few dozen of steps) later :)
– JazzigulaSep 2 '15 at 20:12

Thanks, at least now I know for sure that there is no such an option :)
– JazzigulaSep 2 '15 at 20:14

My pleasure. :) I've totally been there (Oh wait, I didn't want to add that effect, but I want to keep the scale transform!), but for most histories, all the steps are needed to get to the current state. It would be a total mess if users could delete intermediate actions.
– VickiSep 2 '15 at 20:29

I know that this idea is actually more complicated that it looks at first glance, because some of the later steps could be dependable of the step which should be deleted. But I hoped that PS can delete only dependable steps or something...
– JazzigulaSep 2 '15 at 20:27